clang crashes on valid C++11 code: Assertion `!LHS.get()->getType()->isPlaceholderType() && !RHS.get()->getType()->isPlaceholderType() && "placeholders should have been weeded out by now"' failed

[zhendongsu]

Bugzilla Link	28030
Version	trunk
OS	All
CC	@majnemer,@DougGregor,@hfinkel

Extended Description

The current clang trunk crashes when compiling the following valid C++11 test case on x86_64-linux-gnu in both 32-bit and 64-bit modes.

This is a regression from 3.8.x.

$ clang++ -v
clang version 3.9.0 (trunk 271877)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@MX32
Selected multilib: .;@m64
$
$ clang++-3.8 -c -std=c++11 small.cpp
$ g++-6.1 -c -Wall -Wextra -pedantic -std=c++11 small.cpp
$
$ clang++ -c -std=c++11 small.cpp
clang-3.9: /tmp/llvm-builder/llvm-source-trunk/tools/clang/lib/Sema/SemaExprCXX.cpp:4670: clang::QualType clang::Sema::CheckPointerToMemberOperands(clang::ExprResult&, clang::ExprResult&, clang::ExprValueKind&, clang::SourceLocation, bool): Assertion `!LHS.get()->getType()->isPlaceholderType() && !RHS.get()->getType()->isPlaceholderType() && "placeholders should have been weeded out by now"' failed.
#​0 0x0000000001e1a4f5 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/local/clang-trunk/bin/clang-3.9+0x1e1a4f5)
#​1 0x0000000001e18486 llvm::sys::RunSignalHandlers() (/usr/local/clang-trunk/bin/clang-3.9+0x1e18486)
#​2 0x0000000001e186a4 SignalHandler(int) (/usr/local/clang-trunk/bin/clang-3.9+0x1e186a4)
#​3 0x00007f5428fe6340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#​4 0x00007f5428204cc9 gsignal /build/eglibc-3GlaMS/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#​5 0x00007f54282080d8 abort /build/eglibc-3GlaMS/eglibc-2.19/stdlib/abort.c:91:0
#​6 0x00007f54281fdb86 __assert_fail_base /build/eglibc-3GlaMS/eglibc-2.19/assert/assert.c:92:0
#​7 0x00007f54281fdc32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#​8 0x0000000002d35275 clang::Sema::CheckPointerToMemberOperands(clang::ActionResult<clang::Expr*, true>&, clang::ActionResult<clang::Expr*, true>&, clang::ExprValueKind&, clang::SourceLocation, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2d35275)
#​9 0x0000000002ce7815 clang::Sema::CreateBuiltinBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/usr/local/clang-trunk/bin/clang-3.9+0x2ce7815)
#​10 0x0000000002e6745f clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&, clang::Expr*, clang::Expr*) (/usr/local/clang-trunk/bin/clang-3.9+0x2e6745f)
#​11 0x0000000002cafa24 BuildOverloadedBinOp(clang::Sema&, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/usr/local/clang-trunk/bin/clang-3.9+0x2cafa24)
#​12 0x0000000002ce8112 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/usr/local/clang-trunk/bin/clang-3.9+0x2ce8112)
#​13 0x0000000002f3e29f clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformBinaryOperator(clang::BinaryOperator*) (/usr/local/clang-trunk/bin/clang-3.9+0x2f3e29f)
#​14 0x0000000002f3b7f7 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) (/usr/local/clang-trunk/bin/clang-3.9+0x2f3b7f7)
#​15 0x0000000002f44c1a clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) (/usr/local/clang-trunk/bin/clang-3.9+0x2f44c1a)
#​16 0x0000000002f458fa clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) (/usr/local/clang-trunk/bin/clang-3.9+0x2f458fa)
#​17 0x0000000002f45a62 clang::Sema::SubstType(clang::TypeSourceInfo*, clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, clang::DeclarationName) (/usr/local/clang-trunk/bin/clang-3.9+0x2f45a62)
#​18 0x0000000002ea7d26 SubstDefaultTemplateArgument(clang::Sema&, clang::TemplateDecl*, clang::SourceLocation, clang::SourceLocation, clang::TemplateTypeParmDecl*, llvm::SmallVectorImplclang::TemplateArgument&) (/usr/local/clang-trunk/bin/clang-3.9+0x2ea7d26)
#​19 0x0000000002eab5d4 clang::Sema::SubstDefaultTemplateArgumentIfAvailable(clang::TemplateDecl*, clang::SourceLocation, clang::SourceLocation, clang::Decl*, llvm::SmallVectorImplclang::TemplateArgument&, bool&) (/usr/local/clang-trunk/bin/clang-3.9+0x2eab5d4)
#​20 0x0000000002f0cabe clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImplclang::DeducedTemplateArgument&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImplclang::Sema::OriginalCallArg const*, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2f0cabe)
#​21 0x0000000002f17c1a clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRefclang::Expr*, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2f17c1a)
#​22 0x0000000002e52c46 clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRefclang::Expr*, clang::OverloadCandidateSet&, bool, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2e52c46)
#​23 0x0000000002e54d3a clang::Sema::AddOverloadedCallCandidates(clang::UnresolvedLookupExpr*, llvm::ArrayRefclang::Expr*, clang::OverloadCandidateSet&, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2e54d3a)
#​24 0x0000000002e550dd clang::Sema::buildOverloadedCallSet(clang::Scope*, clang::Expr*, clang::UnresolvedLookupExpr*, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::OverloadCandidateSet*, clang::ActionResult<clang::Expr*, true>) (/usr/local/clang-trunk/bin/clang-3.9+0x2e550dd)
#​25 0x0000000002e622d8 clang::Sema::BuildOverloadedCallExpr(clang::Scope, clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*, bool, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2e622d8)
#​26 0x0000000002cfd095 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRefclang::Expr*, clang::SourceLocation, clang::Expr*, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x2cfd095)
#​27 0x000000000296914a clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) (/usr/local/clang-trunk/bin/clang-3.9+0x296914a)
#​28 0x0000000002963ad8 clang::Parser::ParseCastExpression(bool, bool, bool&, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x2963ad8)
#​29 0x000000000296663d clang::Parser::ParseCastExpression(bool, bool, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x296663d)
#​30 0x000000000296400b clang::Parser::ParseCastExpression(bool, bool, bool&, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x296400b)
#​31 0x000000000296663d clang::Parser::ParseCastExpression(bool, bool, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x296663d)
#​32 0x0000000002964af5 clang::Parser::ParseCastExpression(bool, bool, bool&, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x2964af5)
#​33 0x000000000296663d clang::Parser::ParseCastExpression(bool, bool, clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x296663d)
#​34 0x000000000296abce clang::Parser::ParseConstantExpression(clang::Parser::TypeCastState) (/usr/local/clang-trunk/bin/clang-3.9+0x296abce)
#​35 0x0000000002953caf clang::Parser::ParseStaticAssertDeclaration(clang::SourceLocation&) (/usr/local/clang-trunk/bin/clang-3.9+0x2953caf)
#​36 0x000000000294cede clang::Parser::ParseDeclaration(unsigned int, clang::SourceLocation&, clang::Parser::ParsedAttributesWithRange&) (/usr/local/clang-trunk/bin/clang-3.9+0x294cede)
#​37 0x000000000292b8d2 clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) (/usr/local/clang-trunk/bin/clang-3.9+0x292b8d2)
#​38 0x000000000292c080 clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&) (/usr/local/clang-trunk/bin/clang-3.9+0x292c080)
#​39 0x000000000292365b clang::ParseAST(clang::Sema&, bool, bool) (/usr/local/clang-trunk/bin/clang-3.9+0x292365b)
#​40 0x00000000025c23fe clang::CodeGenAction::ExecuteAction() (/usr/local/clang-trunk/bin/clang-3.9+0x25c23fe)
#​41 0x000000000228f1fe clang::FrontendAction::Execute() (/usr/local/clang-trunk/bin/clang-3.9+0x228f1fe)
#​42 0x0000000002264c66 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/local/clang-trunk/bin/clang-3.9+0x2264c66)
#​43 0x000000000231c362 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/local/clang-trunk/bin/clang-3.9+0x231c362)
#​44 0x0000000000aecce8 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/local/clang-trunk/bin/clang-3.9+0xaecce8)
#​45 0x0000000000aa14de main (/usr/local/clang-trunk/bin/clang-3.9+0xaa14de)
#​46 0x00007f54281efec5 __libc_start_main /build/eglibc-3GlaMS/eglibc-2.19/csu/libc-start.c:321:0
#​47 0x0000000000ae8d54 _start (/usr/local/clang-trunk/bin/clang-3.9+0xae8d54)
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang-3.9 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name small.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -coverage-file /data2/small.cpp -resource-dir /usr/local/clang-trunk/bin/../lib/clang/3.9.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward -internal-isystem /usr/local/include -internal-isystem /usr/local/clang-trunk/bin/../lib/clang/3.9.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /data2 -ferror-limit 19 -fmessage-length 205 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o small.o -x c++ small.cpp

1. small.cpp:14:29: current parser token ')'
   clang-3.9: error: unable to execute command: Aborted (core dumped)
   clang-3.9: error: clang frontend command failed due to signal (use -v to see invocation)
   clang version 3.9.0 (trunk 271877)
   Target: x86_64-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /usr/local/clang-trunk/bin
   clang-3.9: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
   clang-3.9: note: diagnostic msg:

---

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.9: note: diagnostic msg: /tmp/small-c3f354.cpp
clang-3.9: note: diagnostic msg: /tmp/small-c3f354.sh
clang-3.9: note: diagnostic msg:

---

$

---

struct S;

template < typename T > T foo ();

template < typename T, typename = decltype (foo < T > ().*foo) >
void bar (int);

template < typename >
constexpr bool bar (bool)
{
return false;
}

static_assert (!bar < S > (0), "");

[fhahn]

Still crashes: https://clang.godbolt.org/z/3Wx7xP4qa

[llvmbot]

@llvm/issue-subscribers-clang-frontend

[Endilll]

Backtrace from post-16 trunk:

clang++: /root/llvm-project/clang/lib/Sema/SemaExprCXX.cpp:5973:
clang::QualType clang::Sema::CheckPointerToMemberOperands(clang::ExprResult&, clang::ExprResult&, clang::ExprValueKind&, clang::SourceLocation, bool):
Assertion `!LHS.get()->hasPlaceholderType() && !RHS.get()->hasPlaceholderType() && "placeholders should have been weeded out by now"' failed.

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<source>:14:29: current parser token ')'
 #0 0x000055a6f9a9ac1a llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3a9ac1a)
 #1 0x000055a6f9a9884c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3a9884c)
 #2 0x000055a6f99e7020 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f9ccd886420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #4 0x00007f9ccd35300b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #5 0x00007f9ccd332859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #6 0x00007f9ccd332729 (/lib/x86_64-linux-gnu/libc.so.6+0x22729)
 #7 0x00007f9ccd343fd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6)
 #8 0x000055a6fc3b44e6 clang::Sema::CheckPointerToMemberOperands(clang::ActionResult<clang::Expr*, true>&, clang::ActionResult<clang::Expr*, true>&, clang::ExprValueKind&, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63b44e6)
 #9 0x000055a6fc2e03ad clang::Sema::CreateBuiltinBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62e03ad)
#10 0x000055a6fc5ecd4a clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65ecd4a)
#11 0x000055a6fc27e2fc BuildOverloadedBinOp(clang::Sema&, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) SemaExpr.cpp:0:0
#12 0x000055a6fc2e1620 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62e1620)
#13 0x000055a6fc7ae423 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformBinaryOperator(clang::BinaryOperator*) SemaTemplateInstantiate.cpp:0:0
#14 0x000055a6fc7ab3c4 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#15 0x000055a6fc7b7038 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDecltypeType(clang::TypeLocBuilder&, clang::DecltypeTypeLoc) SemaTemplateInstantiate.cpp:0:0
#16 0x000055a6fc7b835b clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateInstantiate.cpp:0:0
#17 0x000055a6fc7bd526 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) SemaTemplateInstantiate.cpp:0:0
#18 0x000055a6fc7c546e clang::Sema::SubstType(clang::TypeSourceInfo*, clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation, clang::DeclarationName, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67c546e)
#19 0x000055a6fc6654bb SubstDefaultTemplateArgument(clang::Sema&, clang::TemplateDecl*, clang::SourceLocation, clang::SourceLocation, clang::TemplateTypeParmDecl*, llvm::ArrayRef<clang::TemplateArgument>, llvm::ArrayRef<clang::TemplateArgument>) (.isra.9627) SemaTemplate.cpp:0:0
#20 0x000055a6fc667dae clang::Sema::SubstDefaultTemplateArgumentIfAvailable(clang::TemplateDecl*, clang::SourceLocation, clang::SourceLocation, clang::Decl*, llvm::ArrayRef<clang::TemplateArgument>, llvm::ArrayRef<clang::TemplateArgument>, bool&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6667dae)
#21 0x000055a6fc777cb1 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6777cb1)
#22 0x000055a6fc77938e void llvm::function_ref<void ()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)::'lambda1'()>(long) SemaTemplateDeduction.cpp:0:0
#23 0x000055a6fbf616ff clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5f616ff)
#24 0x000055a6fc789263 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6789263)
#25 0x000055a6fc5d9779 clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (.constprop.1946) SemaOverload.cpp:0:0
#26 0x000055a6fc5da5d3 AddOverloadedCallCandidate(clang::Sema&, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool) SemaOverload.cpp:0:0
#27 0x000055a6fc5da8e0 clang::Sema::AddOverloadedCallCandidates(clang::UnresolvedLookupExpr*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65da8e0)
#28 0x000055a6fc5dac24 clang::Sema::buildOverloadedCallSet(clang::Scope*, clang::Expr*, clang::UnresolvedLookupExpr*, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::OverloadCandidateSet*, clang::ActionResult<clang::Expr*, true>*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65dac24)
#29 0x000055a6fc5e7c54 clang::Sema::BuildOverloadedCallExpr(clang::Scope*, clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65e7c54)
#30 0x000055a6fc2e4120 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62e4120)
#31 0x000055a6fc2e94f2 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x62e94f2)
#32 0x000055a6fbe95005 clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e95005)
#33 0x000055a6fbe8ecb7 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e8ecb7)
#34 0x000055a6fbe90002 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e90002)
#35 0x000055a6fbe91ca6 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e91ca6)
#36 0x000055a6fbe8f367 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e8f367)
#37 0x000055a6fbe91ca6 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e91ca6)
#38 0x000055a6fbe99c7f clang::Parser::ParseConstantExpressionInExprEvalContext(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e99c7f)
#39 0x000055a6fbe7a34b clang::Parser::ParseStaticAssertDeclaration(clang::SourceLocation&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e7a34b)
#40 0x000055a6fbe738f5 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e738f5)
#41 0x000055a6fbe439c0 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e439c0)
#42 0x000055a6fbe45176 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e45176)
#43 0x000055a6fbe3a22b clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5e3a22b)
#44 0x000055a6fab67560 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b67560)
#45 0x000055a6fa4892e9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44892e9)
#46 0x000055a6fa41dc42 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x441dc42)
#47 0x000055a6fa560c9f clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4560c9f)
#48 0x000055a6f7222cc3 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x1222cc3)
#49 0x000055a6f721ade8 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#50 0x000055a6fa2912f9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#51 0x000055a6f99e74a5 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x39e74a5)
#52 0x000055a6fa293eee clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4293eee)
#53 0x000055a6fa26060b clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x426060b)
#54 0x000055a6fa2611e3 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42611e3)
#55 0x000055a6fa269fd6 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4269fd6)
#56 0x000055a6f7220a8e clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x1220a8e)
#57 0x000055a6f7151cb1 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x1151cb1)
#58 0x00007f9ccd334083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#59 0x000055a6f721a4da _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x121a4da)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

[zwuis]

Doesn't crash since #83103 (found by using git bisect).